Tree-level quantum field theory corresponds to classical field limits
Tree-level quantum field theory successfully recovers classical field limits and classical amplitudes.
The retrieved literature directly supports the standard foundational physics principle that tree-level terms in quantum field theories correspond to classical field limits, as demonstrated in both scalar field theory studies and modern gravitational scattering amplitudes.
S. Nagy, J. Polonyi. Classical limit of a scalar quantum field theory. 2025. https://doi.org/10.1103/8z4q-kwth
Paper [2] confirms the classical limit conditions for scalar quantum field theories.
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Lucile Cangemi, Marco Chiodaroli, Henrik Johansson, Alexander Ochirov, Paolo Pichini, Evgeny Skvortsov. Compton Amplitude for Rotating Black Hole from QFT.. 2024. https://doi.org/10.1103/PhysRevLett.133.071601
Paper [4] extracts classical gravitational amplitudes directly from tree-level quantum field theory approaches.
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